What Hot Water Systems Are Most Common in Christchurch Homes?

The Christchurch Hot Water Landscape

Based on the Christchurch housing stock:

• Low-pressure electric cylinder: Very common in homes built pre-1990. Large proportion of inner Christchurch and older suburb housing.
• Mains pressure electric cylinder: Standard in homes built from mid-1990s onwards. The most common type in newer suburbs like Halswell, Rolleston, and Pegasus.
• Heat pump hot water: Growing rapidly — now a significant proportion of all replacements. Common in homes built post-2010 and as upgrades in energy-conscious households.
• Gas continuous flow: Present in areas with natural gas reticulation (central city, suburbs with gas supply). Less common than in Wellington or Auckland.

The Canterbury Gas Network

Natural gas is available in many but not all Christchurch suburbs. The 2010–2011 earthquakes disrupted some gas infrastructure, and some areas were not reconnected. Before considering gas hot water, confirm your property has a gas connection. Contact your local gas distributor or check at gasnz.org.nz.

What's the Trend for Replacements?

The trend in Christchurch is clearly toward heat pump hot water as the replacement of choice. EECA rebates, rising power prices, and increasing environmental awareness are all driving adoption. Within 5–10 years, heat pump systems will likely be the dominant type for active installations across the Canterbury region.